n | a(n) |
---|---|
2 | 1 |
3 | 3 |
4 | 15 |
5 | 85 |
6 | 531 |
7 | 3600 |
8 | 26266 |
9 | 205353 |
10 | 1716582 |
11 | 15321056 |
12 | 145819266 |
13 | 1477589301 |
14 | 15908557455 |
15 | 181553715486 |
16 | 2190398368254 |
17 | 27859946518796 |
18 | 372542199781464 |
19 | 5223365137285467 |
20 | 76597458027515272 |
21 | 1172078722366916586 |
[1,3,15,85,531,3600,26266,205353,1716582,15321056, 145819266,1477589301,15908557455,181553715486, 2190398368254,27859946518796,372542199781464, 5223365137285467,76597458027515272, 1172078722366916586] |